Lesson 10 II

Question 1

Lenses causing for parallel lines to converge are

Answer 1

Plus lenses

Question 2

Lenses causing parallel lines to diverge are

Answer 2

Minus lenses

Question 3

Wavelengths are measured in

Answer 3

no

Question 4

What are three types of UV rays

Answer 4

1. UVC
2. UVB
3. UVA

Question 5

Sunglasses are recommended to protect from

Answer 5

UVA AND UVB

Question 6

Light bends randomly on:

Answer 6

1. Fresh LASIK eye
2. Dirty/dry contact
3. Dry cornea

Question 7

Light bends towards the normal when it

Answer 7

Enters a medium more dense than the one it came from

Question 8

Snell’s law helps determine

Answer 8

The angle at which light will bend as it passes from one substance to another ?

Question 9

High-index lenses allow for

Answer 9

Thinner lenses

Question 10

High-index lenses have a compressed central optical zone and also cause

Answer 10

A high degree of dispersion

Question 11

What is chromatic aberration

Answer 11

Seeing color around images

Question 12

What is the abbe value

Answer 12

The measurement used to measure amount of dispersion produced by different lenses

Question 13

The lower the number of abbe value, the

Answer 13

Higher the amount of dispersion

Question 14

Abbe value is also called

Answer 14

1. NU value

2. Constringent

Question 15

+ lenses are shaped

Answer 15

Convex

Question 16

• lenses are shaped

Answer 16

Concave

Question 17

Plano lenses have

Answer 17

One flat and one convex

Question 18

Meniscus lenses have

Answer 18

One concave one complex